Page 193 - Basics of MATLAB and Beyond

xcentre = -0.6;
ycentre = 0;
L = 1.5;
x = linspace(xcentre - L,xcentre + L,N);
y = linspace(ycentre - L,ycentre + L,N);
[X,Y] = meshgrid(x,y);
Z=X+ i*Y;
Z0=Z;
for k = 1:50;
Z = Z.^2 + Z0;
end
ind1 = find(isnan(Z));
ind2 = find(~isnan(Z));
Z(ind1) = 1;
Z(ind2) = 0;
contour(x,y,abs(Z),[.5 .5])
grid;box
axis equal off

You must tell the profile command which function you want to look
at. The format of this command changed between matlab versions 5.2
and 5.3.

Profile in MATLAB 5.2
Initiate the profiler in matlab version 5.2 by typing:

profile mandelbrot
Now go ahead and run the function:

mandelbrot

To see where matlab spent most of its time, type:
>> profile report
Total time in "mandelbrot.m": 30.12 seconds

100% of the total time was spent on lines:
[15 21 12 18 17 19 11 20 22 16 ]

c 2000 by CRC Press LLC